Digitala Vetenskapliga Arkivet

Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Realization of Sodium-ion Batteries: From Electrode to Electrolyte Materials
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - Ångström, Structural Chemistry.
2020 (English)Doctoral thesis, comprehensive summary (Other academic)
Description
Abstract [en]

Batteries are among the most important technologies required to enable the world to move beyond fossil fuels towards a more efficient and environmentally friendly society based on electricity from renewable sources. Unfortunately, the rapidly increasing number and size of batteries that the world needs in order to perform this paradigm shift is putting enormous strain on the supply of traditional raw materials for batteries, such as lithium and cobalt. Batteries built using only earth abundant elements could guarantee that the supply of energy storage will be available to everyone at reasonable prices. Sodium-ion batteries are among the most popular candidates to achieve battery systems that can provide performance close to or on par with lithium-ion batteries at a lower cost and environmental impact. Although the sodium-ion and lithium-ion batteries share many properties, there is a lot of research required before sodium-ion batteries can compete with the highly optimised lithium-ion batteries. This work explores the stability of the solid electrolyte interphase (SEI) formed on the anode in sodium-ion batteries through means of electrochemical measurements and x-ray photoelectron spectroscopy (XPS) analysis. The fundamental properties in regards to solubility and electrochemical stability of the surface layer on model anodes as well as on anode materials like hard carbon and tin-phosphide is discussed. The synthesis and electrochemical performance of Prussian white comprising of all earth abundant elements for use as a low-cost and high-performance cathode material is demonstrated. The work also includes several investigations of alternative solvents and salts for electrolytes that have been analysed in conjunction with sodium-ion cells based on hard carbon and Prussian white. The electrolytes studied possess a wide spectrum of different opportunities such as high ionic conductivity, non-flammability, fluorine-free composition and improved low and high-temperature performance.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2020. , p. 78
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1941
Keywords [en]
Sodium-ion batteries, electrolytes, Prussian white
National Category
Inorganic Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-409502ISBN: 978-91-513-0958-3 (print)OAI: oai:DiVA.org:uu-409502DiVA, id: diva2:1425712
Public defence
2020-06-12, Häggsalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 09:00 (English)
Opponent
Supervisors
Available from: 2020-05-18 Created: 2020-04-22 Last updated: 2020-05-18
List of papers
1. Solubility of the Solid Electrolyte Interphase (SEI) in Sodium Ion Batteries
Open this publication in new window or tab >>Solubility of the Solid Electrolyte Interphase (SEI) in Sodium Ion Batteries
2016 (English)In: ACS Energy Letters, ISSN 2380-8195, Vol. 1, no 6, p. 1173-1178Article in journal, Letter (Refereed) Published
Abstract [en]

It is often stated that formation of a functional solid electrolyte interphase (SEI) in sodium ion batteries is hampered by the higher solubility of SEI components such as sodium salts in comparison to the lithium analogues. In order to investigate these phenomena, SEI formation and functionality, as well as cell self-discharge, are studied for the sodium ion system with comparative experiments on the equivalent lithium ion system. By conducting a set of experiments on carbonaceous anodes, the impact of SEI dissolution is tested. The results show that the SEI layer in sodium ion cells is inferior to that in lithium ion counterparts with regards to self-discharge; sodium cells show a loss in capacity at a dramatic rate as compared to the lithium counterparts when they are stored at sodiated and lithiated states, respectively, for a long time with no external applied current or potential. Also, synchrotron-based hard X-ray photoelectron spectroscopy measurements indicate that the major factor leading to increased self-discharge is dissolution of significant parts of the sodium-based SEI. Furthermore, the influence of fluoroethylene carbonate (FEC) electrolyte additive on self-discharge is tested as part of the work.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2016
Keywords
batteries, sodium, interphase, self-discharge
National Category
Inorganic Chemistry Physical Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry; Chemistry with specialization in Physical Chemistry
Identifiers
urn:nbn:se:uu:diva-307681 (URN)10.1021/acsenergylett.6b00491 (DOI)000390086400016 ()
Funder
Swedish Energy Agency, 40468-1
Available from: 2016-11-19 Created: 2016-11-19 Last updated: 2020-04-22Bibliographically approved
2. Evolution of the solid electrolyte interphase on tin phosphide anodes in sodium ion batteries probed by hard x-ray photoelectron spectroscopy
Open this publication in new window or tab >>Evolution of the solid electrolyte interphase on tin phosphide anodes in sodium ion batteries probed by hard x-ray photoelectron spectroscopy
Show others...
2017 (English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859, Vol. 245, p. 696-704Article in journal (Refereed) Published
Abstract [en]

In this work the high capacity anode material Sn4P3 for sodium ion batteries is investigated by electrochemical cycling and synchrotron-based hard x-ray photoelectron spectroscopy (HAXPES) in order to elucidate the solid electrolyte interphase (SEI) properties during the first 1.5 cycles. The electrochemical properties of tin phosphide (Sn4P3) when used as an anode material are first established in half cells versus metallic sodium in a 1 M NaFSI in EC: DEC electrolyte including 5 vol% FEC as SEI forming additive. The data from these experiments are then used to select the parameters for the samples to be analysed by HAXPES. A concise series of five cycled samples, as well as a soaked and pristine sample, were measured at different states of sodiation after the initial sodiation and after the following full cycle of sodiation and desodiation. Our results indicate that the SEI is not fully stable, as both significant thickness and composition changes are detected during cell cycling. (C) 2017 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD, 2017
Keywords
Solid electrolyte interphase, Sn4P3, Na-ion battery, photoelectron spectroscopy, alloying
National Category
Chemical Sciences
Identifiers
urn:nbn:se:uu:diva-334039 (URN)10.1016/j.electacta.2017.05.173 (DOI)000406762700077 ()
Available from: 2017-11-21 Created: 2017-11-21 Last updated: 2020-04-22Bibliographically approved
3. Capacity fading mechanism of tin phosphide anodes in sodium-ion batteries
Open this publication in new window or tab >>Capacity fading mechanism of tin phosphide anodes in sodium-ion batteries
2018 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 47, no 31, p. 10752-10758Article in journal (Refereed) Published
Abstract [en]

Tin phosphide (Sn4P3) is here investigated as an anode material in half-cell, symmetrical, and full-cell sodium-ion batteries. Results from the half-cells using two different electrolyte salts of sodium bis(fluorosulfonyl)imide (NaFSI) or sodium hexafluorophosphate (NaPF6) show that NaFSI provides improved capacity retention but results from symmetrical cells disclose no advantage for either salt. The impact of high and low desodiation cut-off potentials is studied and the results show a drastic increase in capacity retention when using the desodiation cut-off potential of 1.2 V as compared to 2.5 V. This effect is clear for both NaFSI and NaPF6 salts in a 1:1 binary mixture of ethylene carbonate and diethylene carbonate with 10 vol% fluoroethylene carbonate. Hard X-ray photoelectron spectroscopy (HAXPES) results revealed that the thickness of the solid electrolyte interphase (SEI) changed during cycling and that SEI was stripped from tin particles when tin phosphide was charged to 2.5 V with NaPF6 based electrolyte.

National Category
Inorganic Chemistry
Identifiers
urn:nbn:se:uu:diva-363107 (URN)10.1039/c8dt01068d (DOI)000441151700048 ()29978157 (PubMedID)
Funder
StandUp
Available from: 2018-10-16 Created: 2018-10-16 Last updated: 2020-04-22Bibliographically approved
4. Selective Control of Composition in Prussian White for Enhanced Material Properties
Open this publication in new window or tab >>Selective Control of Composition in Prussian White for Enhanced Material Properties
Show others...
2019 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 31, no 18, p. 7203-7211Article in journal (Refereed) Published
Abstract [en]

Sodium-ion batteries based on Prussian blue analogues (PBAs) are ideal for large-scale energy storage applications due to the ability to meet the huge volumes and low costs required. For Na2-xFe[Fe(CN)(6)](1-y)center dot zH(2)O, realizing its commercial potential means fine control of the concentration of sodium, Fe(CN)(6) vacancies, and water content. To date, there is a huge variation in the literature of composition leading to variable electrochemical performance. In this work, we break down the synthesis of PBAs into three steps for controlling the sodium, vacancy, and water content via an inexpensive, scalable synthesis method. We produce rhombohedral Prussian white Na1.88(5)Fe[Fe-(CN)(6)]center dot 0.18(9)H2O with an initial capacity of 158 mAh/g retaining 90% capacity after 50 cycles. Subsequent characterization revealed that the increased polarization on the 3 V plateau is coincident with a phase transition and reduced utilization of the high-spin Fe(III)/Fe(II) redox couple. This reveals a clear target for subsequent improvements of the material to boost long-term cycling stability. These results will be of great interest for the myriad of applications of PBAs, such as catalysis, magnetism, electrochromics, and gas sorption.

Place, publisher, year, edition, pages
AMER CHEMICAL SOC, 2019
National Category
Materials Chemistry Physical Chemistry
Identifiers
urn:nbn:se:uu:diva-395840 (URN)10.1021/acs.chemmater.9b01494 (DOI)000487859200012 ()
Funder
StandUpSwedish Research Council, 2016-03441ÅForsk (Ångpanneföreningen's Foundation for Research and Development)
Available from: 2019-10-25 Created: 2019-10-25 Last updated: 2020-04-22Bibliographically approved
5. Non-carbonate solvents as electrolytes for sodium-ion batteries: candidate evaluation and resistance behavior of additives and co-solvents
Open this publication in new window or tab >>Non-carbonate solvents as electrolytes for sodium-ion batteries: candidate evaluation and resistance behavior of additives and co-solvents
(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-409480 (URN)
Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2020-04-22
6. Sodium bis(oxalato)borate (NaBOB) in trimethyl phosphate: a fire-extinguishing, fluorine-free, and low-cost electrolyte for fullcell sodium-ion batteries
Open this publication in new window or tab >>Sodium bis(oxalato)borate (NaBOB) in trimethyl phosphate: a fire-extinguishing, fluorine-free, and low-cost electrolyte for fullcell sodium-ion batteries
Show others...
(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-409478 (URN)
Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2020-04-22
7. A wide temperature, low-cost, fluorine-free battery electrolyte based on sodium bis(oxalato)borate
Open this publication in new window or tab >>A wide temperature, low-cost, fluorine-free battery electrolyte based on sodium bis(oxalato)borate
(English)Manuscript (preprint) (Other academic)
National Category
Materials Chemistry
Identifiers
urn:nbn:se:uu:diva-409479 (URN)
Available from: 2020-04-21 Created: 2020-04-21 Last updated: 2020-04-22

Open Access in DiVA

fulltext(2839 kB)46 downloads
File information
File name FULLTEXT01.pdfFile size 2839 kBChecksum SHA-512
07f2e0af5a76e23e566d0a8fa0eb8ee8e7623bb7fe2c188bbd7bd5bf780693085d069e2fc903efb5de6bc08d2ccfb883ca06aff973c87f392eb9817477b74440
Type fulltextMimetype application/pdf

Search in DiVA

By author/editor
Mogensen, Ronnie
By organisation
Structural Chemistry
Inorganic Chemistry

Search outside of DiVA

GoogleGoogle Scholar
Total: 46 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

isbn
urn-nbn

Altmetric score

isbn
urn-nbn
Total: 192 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf